Universal stone mounting



July 31, 1928. 1,679,201

N. M. BAKERIETAL UNIVERSAL STONE MOUNTING Filed NOV. 16,' 1923 INVENTOR Ire/501w! Baker 6Y% ewzge L yang/013 Patented July 31, 1928.

UNITED? STATES PATENT orrics.

NELSON M. BAKER AND GEORGE L. LJUNGLOF, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNORS TO AMERICAN OPTICAL COMPANY, SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARYASSOCIATION OF MASSACHUSETTS.

UNIVERSAL STONE .MoUNTING.

A pplication filed November 16, 1923. Serial No. 675,069.

The present invention relates to an improved stone mounting and has particular reference to a stone mounting for use in connection with the so-called bevel edging machines, and produces astone that maybe properly called a wabbly stone mounting.

A very important object of the invention is to provide a mounting of this nature that may be used for bevelling both faces of av lens simultaneously, which mounting will permit of the stone adapting itself to the various forms oflenses. 4

Another very important object of the invention is to provide amounting of this nature that will allow the stone carried thereby to be readily rocked, said rocking motion being caused by theshape of the lens to be ground. 7

Another very important objectof the-invention is to rovide a mounting of this nature that will greatly reduce the number of parts that have heretofore been neces sitated in constructing machines of thisgeneral nature, and which will at the same time present a stone mounting that will be universally adaptable to allforms of lenses used in ophthalmic mountings.

Another important obj ect of the invention is to provide a mounting ofthis nature that will be strong, durable, comparatively simple and inexpensive in 'manufacture, and that will be well adapted to the uses for which it is designed. C

Other objects and advantages of the invention will become apparent during the course of the following description.

In the drawings wherein like numerals are employed to designate like parts throughout the same, I

Figure 1 is aside elevation of the mounting and stone,

Figure 2 is a vertical transverse section through the stone and mounting,

Figure 3 is a front elevation of the stone showing an improved form of structure that may be used in conjunction with the stone.

In the drawings, wherein for the purposes of illustration is shown the preferred embodiment of our invention, the numeral 5 designates a shaft that is rotated by any suitable power and has keyed thereon a ball member 6 as is clearly shown in Figure2 of the drawings, by means of the pin 7 The pin 7 extends a slight distance beyond the outer periphery of the ball 6, which extensions are designated by the numerals 8, and are adapted to be received within the apertures 9 formed in the cage 10. The cage 10 has a flat inner face 11 and an arcuated outer is held in place by means of the screws 17;

A bolt 18 is adapted to pass through suitable screw threaded apertures formed in, the

flange 14, said bolts having the reduced ends 19 which are received within openings formed in the cage 10, thus forming pivotpoints for the cage number 10. It will, of course, be understood that the bolts 18 are arranged in diametrically opposed relationship so that the cage may readily rock on the ends 19. In addition, a line drawn through the bolts 18 would be at rightangles to the pin 7 so that the cage number 10 will be pivoted in one direction, while the stone and flange will be pivoted in the other direction, thus forming a true universal stone mounting. e

As is shown in Figure 8, steadying means may be disposed adjacent the stone mounting and in this instance the arms 20 are clamped on the portions 21. The inner hands of the arms 20 are bifurcated as at 22, thus within the groove 27 of the stone 13 and in this connection it is pointed out that any form of lens mounting can be used. As the lens is ground it will be seen that the universal mounting or wabbly stone mounting will permit of lateral movement of the stone at the point of contact with the lens so that the stone may readily accommodate itself to any form of lens which is to be ground.

Of course, it will be seen and understood that this stone mounting is so arranged that it will adapt itself to any form of lens to be ground. In other words a flat, toric or menlscus lens may be ground in the groove of the stone and the lens contacting in the groove will cause the said stone to receive the lateral displacements'caused by the said lens. The lens will be held in contact with the said stone as is ordinarily done, that is, by means of clamping means carried by a rotatable shaft which accomodates a suitable former to rock the said lens clamping shaft to and from the stone, and resilient means to hold the lens in perfect contact with the stone at all times during the grinding operation, the stone being so mounted and adaptable to all forms of ophthalmic lenses will be of a universal nature and provide what may be properly termed a floating grindstone.

It is to be understood that the form of our invention herewith shown and described is to be taken as the preferred embodiment of a same, and that various changes in the shape,

size and arrangement of parts may be re sorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described our invention, what and into the second ring on opposite sides thereof in a plane which lies centrally bebers extending from the third ring into the second ring on oppositesides thereof at right angles to the first pin and acting as pivots forthe third'ring and being located in the said plane which lies centrally between the bounding rotational planes of the grinding surface of the. grindstone.

2. A grindstone mounting of the cha 'acter described comprising a shaft, a ring member on the shaft havinga spherical peripheral surface, an annular ring enclosing the spherical surface of thefirst ring and a'th'ird ring enclosing the second ring, an annular grindstone member, means securing the third ring to the annular grindstone member, a pin extending through the shaft and the first ring and into the second ring 011 opposite sides thereof in a plane which lies centrally between the bounding rotational planes of the grinding surface of the grindstone, the e2:- tensions of the pin into the second ring acting as pivots for saidring, pivot members extending from the third ring into the second ring'on opposite sides thereof at right angles to the first pin and acting as pivots for the third ring and being located in the said plane which lies centrally between the bounding rotational planes of the grinding surface of the grindstone, and, a roller niember oneach side of the gri dstone to support the grindstone in substantially perpendicular alignment withthe shaft inone plane.

NELSON BAKER. GEORGEWL, LJUNGLOF. 

